Development of the permanent magnet synchronous motor with optimal rotor construction

开发具有优化转子结构的永磁同步电机

基本信息

批准号：
09650332
负责人：
ONUKI Takashi
金额：
$ 1.22万
依托单位：
Waseda University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1998
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650332/
关键词：
Rotor construction PMSM PWM Space harmonics Damping effect Hybrid FE-BE method Electric circuit Motion equation 同期モータ回転モータ永久磁石電磁界数値解析

项目摘要

The purpose of this paper is to derive an optimal rotor construction in the permanent magnet synchronous motor (PMSM). While the field system of PMSM has generally a single magnet for a mainpole, we replace the magnet into plural sub-magnets having same polarity instead of the single one. The dimensions and arrangements of each sub-magnet are based on the concept of pulse width modulation (PWM). By adopting the proposed sub-magnet scheme, we can not only reduce the undesirable higher space harmonics of the air-gap field in electric machinery but also provide space for damper winding between neighboring sub-magnets. From the investigation by hybrid FE-BE (coupled finite element and boundary element) method and experiment, we presented that the proposed construction is effective for practical use in view of the followings : the magnitude of fundamental in air-gap flux distribution, the ratio of higher space harmonics to the fundamental component, the feasibility of manufacture, the hunting oscillations, and the induction starting.The obtained results by analysis and experiment are as follows.1. The more number of sub-magnets produces the less space harmonics and the higher damping effects. The reduction of air-gap flux by magnet division can be supplemented by adopting the high grade of rare-earth one.2. The damping effects are much influenced by whole amount of rotor bars.3. By applying both electric circuit and motion equation to the hybrid FE-BE method, the precision of analysis could be improved.From the above advantages, we conclude that six-divided type is the most desirable construction among the investigated types. However, considering the difficulties of manufacture, we also propose that four-divided type is effective for practical use.

本文的目的是在永久磁铁同步电动机（PMSM）中得出最佳的转子结构。虽然PMSM的场系统通常具有单个磁铁的主柱，但我们将磁体替换为具有相同极性而不是单个极性的复数子磁铁。每个子磁铁的尺寸和排列基于脉冲宽度调制（PWM）的概念。通过采用拟议的子磁力方案，我们不仅可以减少电气机械中气隙场的不良较高空间谐波，而且还可以为相邻子磁铁之间的阻尼器绕组提供空间。从混合Fe-be（有限元素元素和边界元素）方法和实验进行的研究中，我们介绍了拟议的结构对于以下方面有效地使用：鉴于以下内容：气隙通量分布的基本幅度，较高空间谐波的比率，较高空间谐波的比率与制造的基本成分，狩猎的可行性，以及探索量的可行性和实验。亚磁铁数量越多，产生的空间谐波和较高的阻尼效应。可以通过采用稀土1.2的高级别来补充磁铁分裂的气隙通量。阻尼效应受整个转子条的影响很大。3。通过将电路和运动方程式应用于混合FE-BE方法，可以提高分析的精度。从上述优点中，我们得出结论，六分之型是研究类型中最令人期望的结构。但是，考虑到制造的困难，我们还建议四局类型对于实际使用有效。